Re: free memory keeps going down on 5.4-release
On Monday 06 November 2006 11:08, Roselyn Lee wrote: Hi, We're running freebsd 5-4 release and notice that an idle system's free memroy keeps decreasing. The system has 1 GB memory and the free mem starts at ~700M and goes down steadily until it hits 2M and stays there. After that bringing up more apps on the system doesn't seem to make the free memory any smaller. I checked top and vmstat -m, vmstat -z and can't see where all that memory is going. Does freebsd use memory for disk caching that is not accounted for in these stats? Thanks in advance for any help. Roselyn not to worry, the less free memory, the better. the memory that you cannot see where it goes, is likely cached for application, and would be freed if something else really needed it. the less free memory you see, the quicker your server can react to a request. unless your server is getting into significant swap usage, i would consider little to no free memory available a good thing. cheers, jonathan ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: free memory keeps going down on 5.4-release
In the last episode (Nov 06), Roselyn Lee said: We're running freebsd 5-4 release and notice that an idle system's free memroy keeps decreasing. The system has 1 GB memory and the free mem starts at ~700M and goes down steadily until it hits 2M and stays there. After that bringing up more apps on the system doesn't seem to make the free memory any smaller. I checked top and vmstat -m, vmstat -z and can't see where all that memory is going. Does freebsd use memory for disk caching that is not accounted for in these stats? Yes, free memory is used as cache. As Free decreases, you will see Inact, Cache and Buf increase. -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: free memory keeps going down on 5.4-release
On Nov 6, 2006, at 12:22 PM, Dan Nelson wrote: In the last episode (Nov 06), Roselyn Lee said: Does freebsd use memory for disk caching that is not accounted for in these stats? Yes, free memory is used as cache. As Free decreases, you will see Inact, Cache and Buf increase. Yep. What many people are looking for when they ask how much memory is available to run new programs is actually not just the Free memory, but something closer to Free + Inactive. However, stuff that is in Inactive which has been modified will need to be written out to the swapfile before being evicted to make room for another program... -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: free memory keeps going down on 5.4-release
On Mon, Nov 06, 2006 at 09:08:04AM -0800, Roselyn Lee wrote: Hi, We're running freebsd 5-4 release and notice that an idle system's free memroy keeps decreasing. The system has 1 GB memory and the free mem starts at ~700M and goes down steadily until it hits 2M and stays there. After that bringing up more apps on the system doesn't seem to make the free memory any smaller. I checked top and vmstat -m, vmstat -z and can't see where all that memory is going. Does freebsd use memory for disk caching that is not accounted for in these stats? I believe this is normal. There have been many similar posts and explanatory replies about this sort of thing. There may even be a FAQ on it (but I haven't checked). It is an artifact of how memory allocation works and improved efficiency of memory algoritms. So, do a little archive and FAQ searching. There may also be articles in online publications such as Onlamp or others. jerry Thanks in advance for any help. Roselyn ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
